Journal of neuroimaging : official journal of the American Society of Neuroimaging
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Mild cognitive impairment (MCI) precedes both Alzheimer's disease (AD) dementia and with Lewy bodies (DLB). We investigated proton magnetic resonance spectroscopy (MRS) characteristics of MCI patients who progressed to DLB compared to those who progressed to AD dementia or remained stable. ⋯ MRS may be useful in differentiating MCI patients with prodromal AD dementia from those with prodromal DLB for early disease-specific interventions.
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Case Reports
High-resolution MRI visualization of aneurysmal thrombosis after flow diverter stent placement.
Flow-diverter stents are the new promising tools in the treatment of intracranial aneurysms allowing progressive aneurysm occlusion. Here, we report a case where high-resolution magnetic resonance imaging showed thrombus at fundus of the aneurysm sac, indicating a progressive intraaneurysmal thrombosis after flow-diverter placement.
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Controlled Clinical Trial
Intravenous thrombolysis outcomes in patients presenting with large vessel acute ischemic strokes--CT angiography-based prognosis.
To establish outcome rates for patients receiving intravenous thrombolysis based on vascular occlusion site. ⋯ CTA identification of proximal occlusions is associated with significantly poor outcomes in patients receiving intravenous stroke thrombolysis.
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Comparative Study Clinical Trial
Diffusion-weighted imaging volume as the best predictor of the diffusion-perfusion mismatch in acute stroke patients within 8 hours of onset.
Diagnostic accuracies of standard NCCT, CTA, CTA-SI, FLAIR, and DWI to detect the diffusion-perfusion mismatch (DPM) were compared. ⋯ DWI volume was the best predictor of DPM.
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Comparative Study
Comparison of sagittal and transverse echo planar spectroscopic imaging on the quantification of brain metabolites.
We quantitatively compared sagittal and transverse echo planar spectroscopic imaging (EPSI) on the quantification of metabolite concentrations with consideration of tissue variation. A quantification strategy is proposed to collect the necessary information for quantification of concentrations in a minimized acquisition time. ⋯ We showed that quantified concentrations of sagittal and transverse EPSI after partial volume correction are comparable and reproducible. The proposed quantification strategy can be conveniently adapted into various MRI protocols.